KeEnterCriticalRegion

VOID __stdcall KeEnterCriticalRegion(){
  _ETHREAD *CurrentThread; 

  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  --CurrentThread->Tcb.KernelApcDisable;
}

Referenced by:

CmFcManagerUpdateFeatureConfigurations
EtwpAddGuidEntry
EtwpCoverageSamplerStart
EtwpNotifyGuid
ExpQuerySystemInformation
NtSetSystemInformation
SepFilterToken